atomic/detail/fence_arch_ops_gcc_sparc.hpp

0001 /*
0002  * Distributed under the Boost Software License, Version 1.0.
0003  * (See accompanying file LICENSE_1_0.txt or copy at
0004  * http://www.boost.org/LICENSE_1_0.txt)
0005  *
0006  * Copyright (c) 2020 Andrey Semashev
0007  */
0008 /*!
0009  * \file   atomic/detail/fence_arch_ops_gcc_sparc.hpp
0010  *
0011  * This header contains implementation of the \c fence_arch_operations struct.
0012  */
0013
0014 #ifndef BOOST_ATOMIC_DETAIL_FENCE_ARCH_OPS_GCC_SPARC_HPP_INCLUDED_
0015 #define BOOST_ATOMIC_DETAIL_FENCE_ARCH_OPS_GCC_SPARC_HPP_INCLUDED_
0016
0017 #include <boost/memory_order.hpp>
0018 #include <boost/atomic/detail/config.hpp>
0019 #include <boost/atomic/detail/header.hpp>
0020
0021 #ifdef BOOST_HAS_PRAGMA_ONCE
0022 #pragma once
0023 #endif
0024
0025 namespace boost {
0026 namespace atomics {
0027 namespace detail {
0028
0029 //! Fence operations for SPARC
0030 struct fence_arch_operations_gcc_sparc
0031 {
0032     static BOOST_FORCEINLINE void thread_fence(memory_order order) BOOST_NOEXCEPT
0033     {
0034         switch (order)
0035         {
0036         case memory_order_release:
0037             __asm__ __volatile__ ("membar #StoreStore | #LoadStore" ::: "memory");
0038             break;
0039         case memory_order_consume:
0040         case memory_order_acquire:
0041             __asm__ __volatile__ ("membar #LoadLoad | #LoadStore" ::: "memory");
0042             break;
0043         case memory_order_acq_rel:
0044             __asm__ __volatile__ ("membar #LoadLoad | #LoadStore | #StoreStore" ::: "memory");
0045             break;
0046         case memory_order_seq_cst:
0047             __asm__ __volatile__ ("membar #Sync" ::: "memory");
0048             break;
0049         case memory_order_relaxed:
0050         default:
0051             break;
0052         }
0053     }
0054
0055     static BOOST_FORCEINLINE void signal_fence(memory_order order) BOOST_NOEXCEPT
0056     {
0057         if (order != memory_order_relaxed)
0058             __asm__ __volatile__ ("" ::: "memory");
0059     }
0060 };
0061
0062 typedef fence_arch_operations_gcc_sparc fence_arch_operations;
0063
0064 } // namespace detail
0065 } // namespace atomics
0066 } // namespace boost
0067
0068 #include <boost/atomic/detail/footer.hpp>
0069
0070 #endif // BOOST_ATOMIC_DETAIL_FENCE_ARCH_OPS_GCC_SPARC_HPP_INCLUDED_